Question and answer
explain effects of soil physical properties on crop production
Crops have been grown in the subhumid and semiarid Argentinean Pampas for over 50 years using tillage methods (intensive plowing) introduced from more humid regions. [ As a result, soil degradation due to erosion by wind and water has been moderate to severe. Experiments to control erosion through use of conservation systems were initiated at six semiarid and subhumid sites in the Argentinean
Pampas between 1976 and 1990 and conducted for 5 to 11 years. In this paper, we summarize the effect of conventional and conservation tillage treatments on some soil properties and crop yields. Most soil physical, chemical, and biological properties were improved by conservation systems, but the rate of change differed due to climatic and soil differences among sites, with the difference due to tillage generally being greater at the more humid sites with loamy soils than at the drier sites with sandier soils. Crops with a large N requirement yielded less with conservation than with conventional tillage systems. Use of conservation tillage can improve or stabilize soil conditions in the region, but crop nutrient requirements must be met to achieve optimum crop yields when conservation tillage is used. Research regarding the plant nutrient requirements under conservation tillage is being conducted. Also, conservation tillage is gaining acceptance in the Argentinean Pampas region. ]
Expert answered|ANGEEELICA|Points 2208|
Question
Asked 3/18/2011 5:14:41 AM
0 Answers/Comments
Get an answer
New answers
Rating

There are no new answers.

Comments

There are no comments.

Add an answer or comment
Log in or sign up first.
18,794,594 questions answered
Popular Conversations
Write the quadratic equation in general form. What is the value of b ...
Weegy: 8x + 3 = 7x - 2 8x - 7x = -2 - 3 x = -5 User: If (x + 1)(x - 3) = 5, then which of the following statements ...
12/18/2014 12:37:17 PM| 4 Answers
Find the sum of (5x3 + 3x2 - 5x + 4) and (8x3 -5x2 + 8x + 9).
Weegy: (5x3 + 3x2 - 5x + 4) + (8x3 -5x2 + 8x + 9) = 13x^3 2x^2 + 3x + 13
12/18/2014 10:16:03 AM| 3 Answers
Which ordered pairs is the solution for the given system. x + 3y = ...
Weegy: A. (-1, 3) User: Solve the system, using substitution. 4x + y = 4 and y = 4 - 4x A. no ...
12/18/2014 11:09:21 AM| 3 Answers
Evaluate 0! + 1!.
Weegy: A number can not be divided by zero. The answer to 8/0 is undefined. User: Evaluate. 5!/5!2! Weegy: ...
12/18/2014 12:21:23 PM| 3 Answers
Which of the following does not provide evidence that continents ...
Weegy: B. The existence of glacial grooves does not provide evidence that continents move. User: The most ...
12/18/2014 12:29:01 PM| 3 Answers
Robert E. Lee
Weegy: Robert E. Lee was an American career military officer who is best known for having commanded the Confederate ...
12/18/2014 6:07:56 AM| 2 Answers
Stress is __________. A. positive or negative, depending on ...
Weegy: Stress is the body's automatic physical reaction to real or imagined forces. User: High blood pressure is a ...
12/18/2014 7:37:36 AM| 2 Answers
Which personal pronoun best completes the sentence? How is it used? ...
Weegy: The correct pronoun is: Us; predicate nominative. At first they wouldn't admit to the deed, but later they said, ...
12/18/2014 8:01:31 AM| 2 Answers
Weegy Stuff
S
L
P
Points 1083 [Total 4927]| Ratings 0| Comments 1083| Invitations 0|Offline
S
L
Points 688 [Total 1379]| Ratings 1| Comments 678| Invitations 0|Offline
S
1
L
1
L
P
P
L
P
Points 662 [Total 14847]| Ratings 0| Comments 662| Invitations 0|Offline
S
Points 639 [Total 639]| Ratings 1| Comments 629| Invitations 0|Offline
S
P
C
L
P
L
1
Points 88 [Total 6407]| Ratings 1| Comments 78| Invitations 0|Offline
S
L
Points 68 [Total 1528]| Ratings 1| Comments 58| Invitations 0|Offline
S
1
L
L
Points 33 [Total 6700]| Ratings 0| Comments 33| Invitations 0|Offline
S
Points 30 [Total 30]| Ratings 0| Comments 0| Invitations 3|Offline
S
Points 23 [Total 29]| Ratings 0| Comments 23| Invitations 0|Offline
S
Points 22 [Total 22]| Ratings 0| Comments 2| Invitations 2|Offline
Home | Contact | Blog | About | Terms | Privacy | Social | ©2014 Purple Inc.